842143842 has 12 divisors (see below), whose sum is σ = 1824645030. Its totient is φ = 280714608.

The previous prime is 842143811. The next prime is 842143867. The reversal of 842143842 is 248341248.

It can be written as a sum of positive squares in only one way, i.e., 422672481 + 419471361 = 20559^2 + 20481^2 .

It is a junction number, because it is equal to n+sod(n) for n = 842143797 and 842143806.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23392867 + ... + 23392902.

Almost surely, 2^842143842 is an apocalyptic number.

842143842 is an abundant number, since it is smaller than the sum of its proper divisors (982501188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

842143842 is a wasteful number, since it uses less digits than its factorization.

842143842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46785777 (or 46785774 counting only the distinct ones).

The product of its digits is 49152, while the sum is 36.

The square root of 842143842 is about 29019.7147125881. The cubic root of 842143842 is about 944.3408118087.

The spelling of 842143842 in words is "eight hundred forty-two million, one hundred forty-three thousand, eight hundred forty-two".